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AP Physics C: E&M
11.3 Resistance, Resistivity, and Ohm’s Law
IntermediateMCQMathematical22.1k
Truncated conical resistor of length \(L\) with end radii \(a\) and \(b\).
Truncated conical resistor of length \(L\) with end radii \(a\) and \(b\).
A resistor made of a material with uniform resistivity \(\rho\) is manufactured in the shape of a truncated cone of length \(L\). The two circular end-faces have radii \(a\) and \(b\), with \(b > a\). Current flows uniformly parallel to the central axis, entering one circular end and leaving through the other. Which of the following expressions represents the total resistance \(R\) of the resistor?

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